Door-spring



(No Model.)

M. O. MOHR.

Door Spring. No. 236,688. Patented Jan. 18, I881.

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ATTYE N4 PETERS, PHoT0-L|THOGRAPNEn, WASHIQGTON, D C.

FFICO MARTIN G. MOHR, OF MANCHESTER, IOWA.

DOOR-SPRING.

SPECIFICATION forming part of Letters Patent No. 236,688, dated January18, 1881. I

Application filed March 12, 1880. (No model.)

To all whom it may concern Be it known that I, MARTIN O. MOHR, ofManchester, Delaware county, State of Iowa, have invented certain newand useful Improvements in Door-Springs, of which the followin is aspecification.

Thisinvention relates to that class of doorspringsin which a spiralcoilis employed in connection with a vertical shaft; and it consists,mainly, in constructing one of the bearing flaps or ears of the springwith a neck or recess adapted to hold the bent end of the spiral coil,and with a socket-sleeve adapted to support both the end of the shaftand the bearing portion of the coil without permitting the two to comein contact with each other.

In the drawings, Figure 1 represents a front elevation of a springconstructed in the special manner herein described; Fig. 2, a plan viewof the bottom end of the spring; Fig. 3, a sectional elevation of thelower flap and the parts directly connected therewith, and Fig. 4 aperspective view of the flap detached.

To enable others skilled in the art to make my improved spring, I willnow proceed to describe fnlly the construction of the same.

A,Figs. 1 and 3, represents the verticalshaft of the spring, and a, Fig.1, the bearing ear or flap supporting the upper end of the same, thefiat portion ofwhich flap is itselfstrongly united to the jainb or doorin any proper manner.

B, Figs. 1, 2, 3, and 4, represents the bearing or flap supporting thelower end of the shaft, the tlat portion of which is also stronglyunited to the door orjamb in any proper manner.

1), Figs. 1, 3, and 4, represents a socketsleeve, which is adapted tosupport the lower end of the shaft A, and also the lower end of the coil0, without permitting contact between them.

b, Fig. 4, represents a neck or recess between the fiat and cylindricalportions of the flap B, which is adapted to receive and hold the bentend 0 of the spring, which extends beyond the bearing portion of thecoil, as shown in Fig. 3. The upper end of the coil is secured to theshaft A in any proper manner.

The general operation of the spring is like others of its class.

Some of the advantages of this special construction are as follows: Byconstructing the lower bearing-flap with a socket-sleeve, the

end of the shaft is so held that it cannot be clamped or bound bywinding the coil too tightly. By constructing the lower bearing.- flapwith a neck the lower end of the coil is securely held without the useof a special socket for the same. By constructing the flap with the twospecial features of construction t. 0., the socket-sleeve and necka moresimple and perfect spring is obtained at a low cost.

1 am aware that the bearing portion of a spiral coil has been separatedfrom a vertical shaft by an interposed sleeve, and therefore do notbroadly claim this feature; but,

Having thus fully described my invention, what I do claim, and desire tosecure by Letters Patent, is

The flap B, having the socket-sleeve b and the neck b, in combinationwith the bearing ends of the shaft A, and coil 0, and the bent end 0 ofthe latter, as described.

MARTIN O. MOHR.

Witnesses:

HENRY W. RULE, WILLIAM A. ROE.

